Hypodermic syringe needle mounting



y 29, 1952 c. B. BURNSIDE 2,604,390

HYPODERMIC SYRINGE NEEDLE MOUNTING Filed May 12, 1951 x INVENTOR.

CAQL 5. 5012/15/05 4%, r 6?. /1 WM Patented July 29, 1952 I HYPODERM'I'C SYRINGE EDBE .MoUN mG'. Carl B. Burnside, Indianapolis rind); assign ft q corporation of Indiana V 1 'AppIic'ation'May'IZ, 1951, seriain 22e 029};

" 5'Glaims. (craze-218).

administration of mass-immunization injections,

i. e., where, forexample injections are administered 'seriatim to persons of a large'group' to combat the spread of an epidemic eras preventive therapy.

In such mass treatment, it is necessary, of course, that the hypodermic needle and the -liquid to be injected be absolutely sterile for each patient. With hypodermicsyringes of the cartridge type it has been customaryto-havethe individual cartridges and needles prepared and packaged in sterile condition ready 'for use-in the syringe body or holder. In such mass injections, extreme care must be used to insure that neither the-needle nor the cartridge whichhasjust been 'employedin the injection of 'one patient,- in any planner be'permittedto'contaminate the syringe barrel or holder during the removal of the 'used needle-and cartridge therefrom. Further aseptic precautions require that a freshly inserted sterile cartridge and newly mounted sterile needle be brought into cooperative association with the cartridge holder without the needle-propercontacting; any portion of the latter during such inadministration of massinjections.

It is an 'object'of the present invention to provide a permanent type hypodermic'syringe cartridge holder'and a disposable needle and cartridge for use therewith all'of'which are sewnstructed and arranged that the assembly. of the cartridge and needle into cooperative association with the holderv and subsequent 'disassembly therefrom maybe efi'ected with but slight attention on thepart of, the user, without necessitating repetitious sterilization of the holder and yet in such manner as insures against contamination of theholder withthe attendant potential contamination of the needle and/or cartridge contents during-these operations; and all-of this,

Eli. Lilly and Company, Indianapolis, Ind., a

notwithstanding that the :particular. injections being administered to a group may; involve aspirati g preparatory to the completion offthe injection in connection withieach of: the several persons composing the. group.

Other objects, 'features, innovations, elements and combinations of my invention will be cdis- -':cernib1e from the following description which is to be taken in conjunction with in'gidrawings.

g the accompany- In the drawings: Fig. lis a side view of theximproyed: syringe showingthe cartridge both without and as mounted within the cartridge holder,

Fig. 21 is anehlarged fragmentalview. of the improvedisyringe showing the hypodermicne'edle being'mounted thereon,

Fig. 3 isan enlargedfragmental side elevation illustratingin. detail a preferred :form of the invention, r i

.Fig. 4isa sectional elevationtaken alongfthe line 4-4 of Fig. 3, and

' Fig. 5:15 a view similar to Fig..3..but showing amodified form of the invention.

vReferring to Fig. 1,. the hypodermic syringe therein shown is of the breech-loading type such as that -fully disclosed in U. S. "Patent No. 1,747,243, issued to Everett L. Hoskins on. February18', 1930. It is to be understood that'the invention is-not limited to this type of syringe but is equally adaptable for use in. connection with any cartridge type of syringe whether the latterbe of the breech or end loading orof the side loading type, the particular embodiment of the invention as shown in 'Fig. 1 being for. illustrative purposes only.

This cartridge 'type'of syringe generally includes a tubular body or cartridge holder [0 having pivotally mounted on one end a breech-head l l, the latter having suitable means v(not shown) associated therewith for locking the-head in the position shown in Fig. 1; The breech-head II. is swingable about its pivots 12, to one sideor the other of'holder H] to permit thefinsertion within the holder of a cartridge 13, the latter containing the ,medicamentiserum or other liquid that is to be injected. Cartridge: l3'is usuallyfformed'of end;.a piston 15 seals the medicament or other liquid within'thecartridge. a

..A .thread'edshank l6 suitablyaflixed to math I5 is adapted to be threadably engaged with the -longitudinal axis of holder Ill.

An exteriorly threaded nipple 22 (Fig. 2) of re-'- duced diameter is preferably formed integrally;

with and projects from the delivery end of holder 10. A relatively wide, continuous slot 23 is; pro-.-

vided in the nipple and extends longitudinally from the outer extremity of the nipple into a substantial portion of the body of holder [0 as clearly shown in the drawings. Adjacent to the leadin tridg'e are assembled in the holder and administhreads of the nipple and at its outer extremity; there is formed a steady-fulcrum 24 which, as shown in Fig. 3, may take the formof a re-en- ..trant curve.

'A hypodermic needle 25 of the'type-generally used with a cartridge holder such as hasjust been described, generally has oppositely disposed pointed ends. 26. The needle is of substantially smaller'diameter than the width of slot 23, said slot being preferably at least 3%; times as wide as the diameter of said needle so that ample clearance is provided between the surface ofnthe needle and a pair of walls 2'! defining the slot 23. An interiorly threaded collar 28 is affixe'd to the needle intermediate its ends, the point of a-ftlxation being at a lesser distance from the inner end 26 of the needle than the overall length of slot 23. Collar 28 is formed adjacent its leading edge with a complementary fulcrum means in the form ofa circular crown 29 adapted to co-operate with the steady-fulcrum 24 as will hereinafter appear.

The procedure for carrying out mass immunization injections of the type described earlier hereinis as follows: 3

The sterile needle is aseptically removed from its wrapper. The user grasps the knurled collar 28 between the fingers of one hand and, supporting holder in in the other, brings crown 29 into engagementwith the upperportion of the reentrant curve of steady-fulcrum 24 as shown in Figs.- 2 and 3, withthe inner end of the needle extending in alignment with the medial longitudinal axis of slot 23 as indicated in Fig. 4. 1 Now, upon a slight rocking action being imparted to collar 29 and utilizing steady-fulcrum 24 and crown 29 co-operatively as piloting guides, the

inner end of the needle is introduced spacedly.

the collar is-lthreaded upon the nipple to secure the needle firmly in position on'the holder. .Next, the breech-headjzltis swung to ohe-r'side and-a cartridge; l3 inserted into holder ldwithgthe 'stopper' 1-4 of the cartridge presented toward the:

inwardly projecting endrjZE .of needle-:25; and

breech-head 1 I isthen' swung back into the position shown in Fig. 1.. Plunger .l Bis advanced in holder -;I 0, into :threaded engagementiwith shank l6. "If 1' j '1' $5.; J 2:

Following thiS.;

nipples,

The syringe is now in condition for administering the injection. Following the insertion of the needle into the patient, plunger I8 may be withdrawn slightly to determine by aspiration whether the insertion made by the needle is intravenous or extravenous and, dependent upon the typ e of injection that is to be given, the iniectionfmayhow be rcftliiwitnc hpitd or the "needlereinserted and "aspiration repeated until the desired condition is met for such completion. Upon completion of the injection the parts are easily and aseptically disassembled i a reverse procedure to that just described, care being taken the inner end oi -the needle does not touch walls andtherebyto invite the possibility of 'contamination. The next sterile needle and carthe provision of. the: cooperating fulcrum guides 'and'the wide slot for receiving the needle substantially precludes against the possibility of contamination, and that the aseptic assembly and disassembly may be carried on in a timesaving andeasy manner. A

. Although the form of the invention as just described iszpreferred; the steady fulcrum24 may take the form .of a bevel such as 30-as shown in Fig; .5; instead..:O :t he re-entrant curve formation; shown in Fig.3. In such event, the leading ,edge of collar 28 is provided with a complementary formation and is chamfered as at 3|. The operation of this form of invention is carried out'in the same manner as described in the foregoing. While specific embodiments of the invention have been described, it is obvious that modifications may be made therein and it is not desired to limit the invention otherwise than is .set forth in the appended claims.

-Iclaim: I 1 l'. A hypodermic syringe of theclassdescribed comprising, in combination, a cartridge holder having an exteriorly threaded'nipple of smaller diameter than said cartridge holder projecting therefrom at one end; said nipple and said cartridge holder having a continuous, longitudinal slotextendingfromthe outer extremity of said nipple into at least a portion of said cartridge holder; said outer extremity of said nipple being formed with a steady-fulcrum; a hypodermic ,needle of materially lesser diameter-than the when the needle is brought into association with said cartridge holder whereby upon a slight rock- 'ing of. said complementary formation of said collar on saidsteady-fulcrum the inwardly projecting end. of the needle is moved-through an arcuate path and aseptically, and positively piloted spacedly within the confines of said slot preparatory to securing the needle and cartridge holder together by .threading the collar upon the '2..A.hypodermic syringe of the cartridge type comprising; in :combination, a cartridge: holder haying aniexteriorly threaded nipple of smaller diameter than saidrcartridge holder projecting therefrom at one end; said nipple and said cartridge holder having a continuous, longitudinal slot extending from the outer extremity of said nipple into at least a portion of said cartridge holder; said outer extremity of said nipple being formed with a reentrantly curved steady-fulcrum; a hypodermic needle of materially lesser diameter than the width of said slot and having an interiorly threaded collar fixed to said needle intermediate its ends; said threads at the inner end of said collar merging into and terminating in a crowned end adapted to rockably seat on said reentrantly curved steady-fulcrum when the needle is brought into association with said cartridge holder whereby upon a slight rocking of said crowned end on said steady-fulcrum the inwardly projecting end of the needle is moved through an arcuate path and aseptically and positively piloted spacedly Within the confines of said slot preparatory to threading the collar upon the nipple.

3. A hypodermic syringe of the cartridge type comprising in combination, a cartridge holder having an exteriorly threaded nipple of smaller diameter than said cartridge holder projecting therefrom at one end; said nipple and said cartridge holder having a continuous, longitudinal slot extending from the outer extremity of said nipple into at least a portion of said cartridge holder; said outer extremity of said nipple being formed with a beveled steady-fulcrum; a hypodermic needle of materially lesser diameter than the width of said slot and having an interiorly threaded collar fixed to said needle intermediate it ends; said threads at the inner end of said collar merging into and terminating in a chamfer corresponding to the bevel of said steady-fulcrum and adapted to rest against said steady-fulcrum when the needle is brought into association with said cartridge holder whereby upon a slight rocking of said chamfer on said steady-fulcrum the inwardly projecting end of the needle is moved through an arcuate path and aseptically and positively piloted spacedly within the confines of said slot without the needles touching any portion of the cartridge holder.

4. A hypodermic syringe of the cartridge type comprising a hypodermic needle having oppositely pointed ends and an internally threaded collar amxed intermediate said ends, a holder for refulcrum guide means formed adjacent the outer extremity of said nipple and the leading edge of said collar cooperative upon the needles being brought into assembly relation with the holder to steady and guide the one Withrespect to the other and thereby facilitate the piloting of the inwardly extending end of said needle through an arcuate path spacedly and aseptically within said slot preparatory to afiixing the needle to the holder as by threading the collar upon the nipple.

5. A hypodermic syringe of the cartridge type comprising a tubular cartridge holder having at one end a breech-loading head for permitting the insertion and removal of a cartridge in and from the holder and at the opposite end a reduced threaded nipple, said nipple having a relatively Wide continuous longitudinally disposed slot extending from the outer extremityof said nipple for a substantial distance into said tubular holder, a hypodermic needle having a threaded collar afixed thereto at a distance from one end thereof less than the length of said slot, cooperative fulcruming means formed adjacent the leading threads of said nipple and said collar, respectively; said fulcrum means being coactive to facilitate the guided, spaced, arcuate entrance of said one end of said needle into said slot upon a slight rocking movement being imparted to said collar following the bringing of said fulcrum means into contact one with the other, with said needle in alignment with the medial longitudinal axis of said slot, and a cartridge-operable plunger guidedly mounted for longitudinal sliding movement in said breech head for effecting aspirating or injecting action on said cartridge.

CARL B. BURNSIDE.

No references cited. 

